Snijders, Tom A.B. Multilevel analysis : an introduction to basic and advanced multilevel modeling / Tom A.B. Snijders and Roel J. Bosker - London : SAGE, 1999 - 266 p. : ill. Includes bibliographical references and index ISBN: 0761958908 Subjects--Topical Terms: MULTIVARIATE ANALYSIS LC Class. No.: QA278 / S644M